CoRVIDJE.] 



OSTEOLOGIA AVIUM. 



[Gaerulin^;. 



Sternum more elongated than in Corvus ; the fissures on the posterior margin 

 narrowed anteriorly to a point, the splints bounding them exteriorly, slightly expanded 

 at the tips ; manubrial process widely bifurcate at the extremity ; remaining bones 

 similar to Corvus ', but not so powerful. 



Measurements, 



Tenths. 



Length of humerus . . . . . 15 



Length of ulna 18 



Length of metacarpus 10 



Length of femur 15 



Length of tibia 23 



Length of metatarsus 16 



Length of sternum 14 



Tenths. 



Breadth of posterior margin of sternum 10 

 Breadth of anterior margin of sternum 9 

 Depth of keel . .... 4 



Length of head 32 



Breadth of head 13 



Length of pelvis 16 



Breadth of pelvis 11 



Tenths. 



Cephalopterus, Geoff. 



Penduliger, Selater. 



I have only fragments of this bird, taken from a skin sent home by Mr. Fraser. 



Sternum very wide on its hinder margin ; foramina small, rounded lateral splints 

 very broad, very slightly expanded at their tips ; keel deep ; manubrial process short, 

 widely bifurcate, hinder margin indented in the centre. 



Pelvis with the ischiadic foramen very large; obturator foramen very small; 

 os pubis very much elongated backwards. 



Ribs with the styliform processes long, rounded at their extremities. 



Furculum in shape similar to Corvus, and with the coracoids very long. 



Measurements. 



Tenths. 



Length of femur 22 



Length of sternum 22 



Breadth of posterior margiu of sternum 1 8 

 Breadth of anterior margin of sternum 14 



Illustrations. 

 Sternum and pelvis, Plate XVIII., fig, 3. 



Cissa, Bote. 



Sinensis, Bodd. 

 Very similar to Corvus, but with the whole of the skeleton much lighter, and not so 

 strongly formed ; the sternum has the sprints bounding the outer margin of the poste- 

 rior foramina slightly curved inwards ; the obturator foramen large ; os pubis not 

 much elongated. 

 148 



Depth of keel 7 



Length of pelvis 25 



Breadth of pelvis 16 



